Linking the Scale to Position with Easy Ease and Limitations

[Dan Ebberts]

Is your position animation 2 keyframes? If so, something like this might work:

p = transform.position;
s = linear(p.value[0],p.key(1).value[0],p.key(2).value[0],0,15);
[s,s]

Dan

[George Henderson]

That’s perfect, it’s doing exactly what I was hoping for. Thank you Dan!
Is there anyway to avoid getting errors when there are no keyframes on the layer?

[Dan Ebberts]

I haven’t tested it, but something like this:


p = transform.position;
if (p.numKeys > 1){
s = linear(p.value[0],p.key(1).value[0],p.key(2).value[0],0,15);
[s,s];
}else{
value;
}


Dan

[George Henderson]

Hi Dan,
Thank you once again! The code works when it’s used outright, but I I’m having trouble implementing it into the script that I’m working on.
Without the no keyframe script, it reads the following:

Y=thisComp.layer(“Y2 – L”).transform.yPosition; //position of the animated layer (2 keyframes, key1=720 & key2=320)
N=Y.numKeys;
K = value+(Y-Y.valueAtTime(0))/2;
var YY=Y.key(N).value;
if(YY<360){[K];} else {value;}

when I add the condition that there may be no keyframes, the script above fails to function. However, I am able to delete the keyframes without receiving any errors; so the first bit is working. I just don’t know how to write: if (keyframes don’t exist AND any value smaller than 360) then do {K}.

Y=thisComp.layer(“Y2 – L”).transform.yPosition;
N=Y.numKeys;
K = value+(Y-Y.valueAtTime(0))/2);

if(N > 1&YY<360) {var YY=Y.key(N).value;[K];} else {value;}

Any ideas how to get the two conditions to work together? Thanks!

[Dan Ebberts]

I haven’t tested this, but I think it would look like this:


Y=thisComp.layer("Y2 - L").transform.yPosition;
N=Y.numKeys;
K = value+(Y-Y.valueAtTime(0))/2);
val = value;
if(N > 1){
YY=Y.key(N).value;
if (YY<360) val = K;
}
val


Dan

[George Henderson]

Dan, you had the answers to every single one of my questions. I’m truly grateful for all your assistance.
Thank you!

[George Henderson]

Hello,
I have been trying to get this to work for the last several hours but to no avail. Could you please let me know where the issue is?
It refuses to run the else statement when the value is => 1280.

Error at line 1… Undefined value used in expression (could be an out of range array subscript?)!!!

Thanks!

PX=thisComp.layer("X1 - R").transform.xPosition;
PN = PX.numKeys;
val=value;
S=33.33

if (PN > 1) {PXK=linear(PX.value,PX.key(1).value,PX.key(2).value,100,33.33333); PNS=PX.key(PN).value; if(PNS < 1280) val=[PXK,PXK];}
else
if(PN > 1) {PNS=PX.key(PN).value; if(PNS => 1280) val=[S,S];}

[Dan Ebberts]

It looks like you have:

if (PN > 1){

followed by :

}else if (PN > 1){

so it will never get to the 2nd one.

Dan